Discussion
A closed surface encloses charges of \( +8 \) nC, \( -3 \) nC and \( +2 \) nC. The flux out of it is
Answer: C
Only the algebraic sum matters, and \( 8 - 3 + 2 = 7 \) nanocoulombs. Where the individual charges sit within the surface makes no difference to the total flux, though it makes a great deal of difference to the field at any particular point.
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